XDBC Server 8.1.3 can be started, but the connection from the client is raising this error:
Connection failed: SQLState: 28000 [TOD] [ODBC Driver] DLLLOAD: acuxdbc04, This application has failed to start because the application configuration is not working properly. For troubleshooting, you should reinstall the application.
Some Visual Basic 2008 RT-Files got corrupted or deleted. Reinstalling those files solves the issue.